Materials Literature
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Superaustenitic stainless steels with about 6% molybdenum (Mo) have now been used successfully for over twenty years because of their high corrosion resistance. Requirements for even better performance have resulted in more highly alloyed superaustenitic steels, also with high nitrogen (N) levels. Substituting W for M…
While the recrystallisation mechanisms and texture development of cold rolled single phase materials especially those of ferritic steels, and to lesser extent, those of austenitic steels are well known and investigated [1,2], the recrystallisation in duplex and super duplex stainless steels was much less subject of re…
Starting from the electrostatic part of the intermolecular multipole interaction energy we derived irreducible spherical tensor formulas for the first-order long-range, interaction-induced first and second pair hyperpolarizabilities ΔβLM and ΔγLM for arbitrary shape monomers. For atoms a general relation is obtained f…
Precipitation in a superaustenitic stainless steel of composition 24Cr-22Ni-7.3Mo-3Mn-0.5N (wt%) has been investigated. Heat treatment at 1050°C for 5 min caused a precipitate structure fairly well resembling that observed in the heat-affected zone after welding. Four different types of precipitates were identified: σ…
We present a detailed experimental and modeling investigation of poly(ethylene-4,4‘-biphenyl dicarboxylate) (PEBB) and the related random copolymers poly(ethylene-4,4‘-biphenyldicarboxylate- co -2,6-naphthalene dicarboxylate) (PEBB/EN). We find that different polymorphs exist for the PEBB homopolymer and suggest a sec…
Unique characteristics were observed in phase-type gratings that were formed in a polymer azobenzene liquid-crystal (PALC) film. Generation of sinusoidal variation of the surface of the film was confirmed by atomic force microscopy. However, comparison of the diffraction efficiency with the surface modulation revealed…
The crystal structure of the fatty acid elongating enzyme beta-ketoacyl [acyl carrier protein] synthase I (KAS I) from Escherichia coli has been determined to 2.3 A resolution by molecular replacement using the recently solved crystal structure of KAS II as a search model. The crystal contains two independent dimers i…
This paper reviews the development of nitrogen alloyed stainless steels. Nitrogen alloying of austenitie stainless steels started at an early stage and was to a large extent caused by nickel shortage However, direct technical advantages such as increased strength of the nitrogen alloyed steels made them attractive alt…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTThe First Synthesis of Well-Defined Poly(2,5-silole)Shigehiro Yamaguchi, Ren-Zhi Jin, Yujiro Itami, Tomoyuki Goto, and Kohei TamaoView Author Information Institute for Chemical Research, Kyoto University Uji, Kyoto 611-0011, Japan Cite this: J. Am. Chem. Soc. 1999, 121…
Variable-temperature (at 4.7 and 9.4 T) and variable-pressure (9.4 T) 17 O nuclear relaxation rates were measured for the Eu(II) aqua ion. Variable-temperature 1 H nuclear magnetic relaxation dispersion (NMRD) profiles were recorded. In addition, EPR spectra of the Eu(II) aqua ion are reported as a function of tempera…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTMetal Encapsulating Carbon Nanostructures from Oligoalkyne Metal ComplexesPeter I. Dosa, Christoph Erben, Vivekanantan S. Iyer, K. Peter C. Vollhardt, and Ian M. WasserView Author Information Department of Chemistry, University of California at Berkeley and the Chemica…
The attachment of porphyrin monomers and multiporphyrin arrays in controlled architectures on electroactive surfaces opens many opportunities for electrochemical studies. Toward this goal, we have developed routes for the preparation of thiol-derivatized porphyrin monomers and porphyrin building blocks that require mi…
Conduction mechanism in ionic glasses is still considered one of the great challenges in physics and chemistry of glasses [A. Bunde, K. Funke, and M. Ingram, Solid State Ionics 105, 1 (1998)]. We show that consequent application of the routine percolation theory leads to the consistent description of most puzzling con…
A lattice Boltzmann model for amphiphilic fluid dynamics is presented. It is a ternary model, in that it conserves mass separately for each chemical species present (water, oil, amphiphile), and it maintains an orientational degree of freedom for the amphiphilic species. Moreover, it models fluid interactions at the m…
Opals are structures composed of the closed packing of spheres in the size range of nano-to-micro meter. They are sintered to create small necks at the points of contact. We have solved the diffusion problem in such structures. The relation between the diffusion coefficient and the termal and electrical conductivity m…
Hall resistivity and magneto-thermopower have been measured for colossal magnetoresistive Tl2Mn2O7 over wide temperature and magnetic-field ranges. These measurements revealed that a small number of free electron-like carriers is responsible for the magneto-transport properties. In contrast to perovskite CMR materials…
We study the dynamics of island nucleation in the presence of adsorbates using kinetic Monte Carlo simulations of a two-species growth model. Adatoms (A-atoms) and impurities (B-atoms) are codeposited, diffuse and aggregate subject to attractive AA- and AB-interactions. Activated exchange of adatoms with impurities is…
In a recent letter, (Phys. Rev. Lett. 82, 2892(1999); cond-mat/9808306) Kamien and Lubensky calculated the energy of the surface constructed via a linear superposition of screw dislocations in SmA phase, and obtained the positive (repulsive) sign of the long-range interaction between dislocations. We would like to obj…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSelf-Assembly of Nanoscopic Dodecahedra from 50 Predesigned ComponentsBogdan Olenyuk, Michael D. Levin, Jeffery A. Whiteford, Jeffrey E. Shield, and Peter J. StangView Author Information Department of Chemistry and Department of Materials Science and Engineering Univer…
A solution of cadmium selenide nanocrystals was used to print inorganic thin-film transistors with field effect mobilities up to 1 square centimeter per volt second. This mobility is an order of magnitude larger than those reported for printed organic transistors. A field effect was achieved by developing a synthesis…